For backup rings (T1, T2, T3, etc.), we have Sakura seals in stock for immediate delivery along with O-rings.
The backup ring specified in JIS B2401-4 (formerly JIS B2407 backup ring for O-rings) is an auxiliary material used for O-rings in high-pressure and dynamic applications. At Sakura Seal, we can also manufacture special dimensions beyond those specified by JIS and other standards, so please feel free to contact us.
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basic information
It is mainly used to prevent the phenomenon of O-ring protrusion. The standard material is Teflon (PTFE / fluoropolymer), and there are three types of standard shapes with different mounting characteristics (T1 spiral, T2 bias cut, T3 endless).
Price information
The price varies depending on the quantity, so please feel free to contact us.
Delivery Time
P1
※In principle, standard products are available for immediate delivery from stock, but delivery times may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
Prevention of O-ring protrusion under high-pressure conditions
Line up（5）
| Model number | overview |
|---|---|
| T1 (Spiral) | This is a backup ring with excellent fit and strength characteristics. |
| T2 (Bias Cut) | This is a backup ring with an excellent fit shape. |
| T3 (Endless) | This is a backup ring with excellent strength characteristics. |
| For Flat Fixed Groove | This is a backup ring with a non-standard shape. |
| For Oil Pneumatic Packing | This is a backup ring with a non-standard shape. |
catalog（1）
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Company information
Sakura Seal Co., Ltd. is a seal product manufacturer that specializes in the production and sale of various sealing products, primarily O-rings, oil seals, and gaskets. We are particularly skilled in molded products made from fluororubber, and we offer a wide range of high-performance materials with special properties, including not only general-purpose FKM materials but also FFKM materials. With our deep knowledge of various sealing products, we maintain a stock of over 20,000 types, even within Tokyo, and strive to remain an organization that provides high convenience for industries and society.
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